Home / 15,509.40-21,402.72-8,435.94

Finding the Fourth Proportional to 15,509.40, 21,402.72 and 8,435.94

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Solution

The fourth proportional to 15,509.40, 21,402.72 and 8,435.94 is: 11,641.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.40 : 21,402.72 = 8,435.94 : x
  2. Step 2: Convert to fraction form
    15,509.40/21,402.72 = 8,435.94/x
  3. Step 3: Cross multiply
    15,509.40x = 21,402.72 × 8,435.94
  4. Step 4: Simplify right side
    15,509.40x = 180,552,061.76
  5. Step 5: Solve for x
    x = 180,552,061.76/15,509.40
  6. Step 6: Final answer
    x = 11,641.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.